Re: [PATCH v5 0/3] Add SSIF BMC driver

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On 16/07/2021 06:32, Corey Minyard wrote:
On Wed, Jul 14, 2021 at 10:38:30AM +0700, Quan Nguyen wrote:
This series add support the SSIF BMC driver which is to perform in-band
IPMI communication with their host in management (BMC) side.

SSIF BMC driver in this series is tested with Aspeed AST2500.

Ok, I have queued this and added Rob's review.  Five versions, you had
to work for this one :).

Thanks,

-corey

Thank you very much for your help in these version :)
- Quan


v5:
   + Correct the patches order to fix the bisect issue found by
   kernel build robot

v4:
   + Fix recursive spinlock                                      [Graeme]
   + Send response with Completion code 0xFF when aborting         [Quan]
   + Fix warning with dt_binding_check                              [Rob]
   + Change aspeed-ssif-bmc.yaml to ssif-bmc.yaml                  [Quan]
   + Added bounding check on SMBus writes and the whole request     [Dan]
   + Moved buffer to end of struct ssif_bmc_ctx to avoid context
     corruption if somehow buffer is written past the end           [Dan]
   + Return -EINVAL if userspace buffer too small, dont
     silence truncate                                       [Corey, Joel]
   + Not necessary to check NONBLOCK in lock                      [Corey]
   + Enforce one user at a time                                    [Joel]
   + Reject write with invalid response length from userspace     [Corey]
   + Add state machines for better ssif bmc state handling         [Quan]
   + Drop ssif_bmc_aspeed.c and make ssif_bmc.c is generic
     SSIF BMC driver                                               [Quan]
   + Change compatible string "aspeed,ast2500-ssif-bmc" to
     "ampere,ssif-bmc"                                             [Quan]
   + Toggle Slave enable in i2c-aspeed to turn on/off slave mode   [Ryan]
   + Added slave_enable() to struct i2c_algorithm to control
     slave mode and to address the recursive spinlock      [Graeme, Ryan]
   + Abort current request with invalid SMBus write or
     invalid command                                               [Quan]
   + Abort all request if there is pending response                [Quan]
   + Changed validate_pec() to validate_request()                  [Quan]
   + Add unsupported_smbus_cmd() to handle unknown SMBus command   [Quan]
   + Print internal state string for ease investigating issue      [Quan]
   + Move to READY state on SLAVE_STOP event                       [Quan]
   + Change initilize_transfer() to process_smbus_cmd()            [Quan]
   + Introduce functions for each slave event                      [Quan]

v3:
   + Switched binding doc to use DT schema format [Rob]
   + Splited into generic ssif_bmc and aspeed-specific [Corey, Joel]
   + Removed redundant license info [Joel]
   + Switched to use traditional if-else [Joel]
   + Removed unused ssif_bmc_ioctl() [Joel]
   + Made handle_request()/complete_response() to return void [Joel]
   + Refactored send_ssif_bmc_response()/receive_ssif_bmc_request()
   [Corey]
   + Remove mutex [Corey]
   + Use spin_lock/unlock_irqsave/restore in callback [Corey]
   + Removed the unnecessary memset [Corey]
   + Switch to use dev_err() [Corey]
   + Combine mask/unmask two interrupts together [Corey]
   + Fixed unhandled Tx done with NAK [Quan]
   + Late ack'ed Tx done w/wo Ack irq [Quan]
   + Use aspeed-specific exported aspeed_set_slave_busy() when slave busy
   to fix the deadlock [Graeme, Philipp, Quan]
   + Clean buffer for last multipart read [Quan]
   + Handle unknown incoming command [Quan]

v2:
   + Fixed compiling error with COMPILE_TEST for arc

Quan Nguyen (3):
   i2c: aspeed: Add slave_enable() to toggle slave mode
   ipmi: ssif_bmc: Add SSIF BMC driver
   bindings: ipmi: Add binding for SSIF BMC driver

  .../devicetree/bindings/ipmi/ssif-bmc.yaml    |  38 +
  drivers/char/ipmi/Kconfig                     |  11 +
  drivers/char/ipmi/Makefile                    |   1 +
  drivers/char/ipmi/ssif_bmc.c                  | 781 ++++++++++++++++++
  drivers/char/ipmi/ssif_bmc.h                  | 106 +++
  drivers/i2c/busses/i2c-aspeed.c               |  20 +
  include/linux/i2c.h                           |   2 +
  7 files changed, 959 insertions(+)
  create mode 100644 Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml
  create mode 100644 drivers/char/ipmi/ssif_bmc.c
  create mode 100644 drivers/char/ipmi/ssif_bmc.h

--
2.28.0





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